EPA is announcing a 60-day extension of the public comment period for the Advance Notice of Proposed Rulemaking on Lead Emissions From Piston-Engine Aircraft Using Leaded Aviation Gasoline (hereinafter referred to as the ANPR). EPA published this ANPR, which included a request for comment, in the Federal Register on April 28, 2010. The public comment period was to end on June 28, 2010 (60 days after its publication in the Federal Register). This document extends the comment period an additional 60 days until August 27, 2010. This extension of the comment period is provided to allow the public additional time to provide comment on the ANPR.